

| Subject: | Re: Tire Load Index - addendum |
| From: | Ari Ollikainen |
| Date: | Mon, 26 Oct 1998 19:30:08 -0800 |
In response to my posting of a load index for values of 71-110,
at 9:15 PM 10/26/98, David-M wrote:
>There is also some law that says that for a passenger tire on a truck,
>you have to reduce the load rating by 10%. That definitely applies to
>the Vanagon.
That's interesting...whose law is it, who does it apply to, and
can you provide a cite?
As far as load index goes, a ServiceDescription includes the load
index and the speed rating of a tire. Thus the Michelin MXT
205/70R14 99S is capable of carrying a maximum of 1709lbs at 112mph.
(Service description == LI + SR == 99 + H => 99H)
Reducing those values by 10% would yield 1538lbs at 101mph.
Considering that *I've* never driven my vanagon faster than 90mph
loaded to GWVR, much less ~6000lbs...I think I have sufficient
safety margin. My Mercury Villager's EagleGA 215/70R15 97H, can be
derated 10% and still capable of carrying about 400lbs over the GVWR
at 117mph, should I be crazy enough to try.
Hmmm...perusing the latest MotorTrend, I noticed that TireRack
doesn't specify the ServiceDescription in their tire ads, choosing
to only list tires by size/aspectratio X wheel diameter X speedrating.
Wonder how many *different* tires from the same manufacturer fit
that description?
OLTECO Ari Ollikainen
P.O. BOX 3688 Networking Technology and Architecture
Stanford, CA Ari@OLTECO.com
94309-3688 415.517.3519Have something to add on this topic today? Revive this thread in the forum »